3-5
Troubleshooting
Hardware Diagnostic Tests
Hardware Diagnostic Tests
Testing the Switch by Resetting It
If you believe the switch is not operating correctly, you can reset the switch
to test its circuitry and operating code. To perform a reset, power cycle the
switch; unplug the power cord, wait 2 seconds, then reconnect power.
Power cycling the switch causes the switch to perform its power-on self test.
Testing Twisted-Pair Cabling
Network cables that fail to provide a link or provide an unreliable link between
the switch and the connected network device may not be compatible with the
IEEE 802.3 Type 10Base-T, 100Base-TX, or 1000Base-T standards. The twisted-
pair cables attached to the switch must be compatible with the appropriate
standards. To verify your cable is compatible with these standards, use a
qualified cable test device.
Testing End-to-End Network Communications
Both the switch and the cabling can be tested by running an end-to-end
communications test—a test that sends known data from one network device
to another through the switch. For example, if you have two PCs on the
network that have LAN adapters between which you can run a link-level test
or Ping test through the switch, you can use this test to verify that the entire
communication path between the two PCs is functioning correctly. See your
LAN adapter documentation for more information on running a link test or
Ping test.
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